Differential Thermal Lens Spectrometry Based on High-Frequency Modulation and Rotoreflective Double-Beam Configuration

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A rotoreflected beam thermal lens spectrometer incorporating high-frequency modulation and the conventional double-beam concept is reported. The former enables a steady-state thermal lens to be generated, while the latter provides a means to produce a differential response that corrects for the reference absorbance automatically. The feasibility of this approach is demonstrated, and a method for improvement based on high-frequency polarization modulation is also proposed.

Keywords: Photothermal spectroscopy; Thermal lens spectroscopy

Document Type: Research Article

DOI: http://dx.doi.org/10.1366/0003702884428617

Affiliations: Department of Chemistry, Loyola University of Chicago, Chicago, Illinois 60626

Publication date: January 1, 1988

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